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boom
Lose 50 points!
Oops!
×
magnet
Take 25 points!
Okay!
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shark
Other team loses 25 points!
Okay!
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lifesaver
Give 15 points!
Oops!
5
×
The "Gain" of an amplifier refers to the ratio of output signal to input signal.
True
False
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Show
Check
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Check
×
trap
No points!
Oops!
×
seesaw
Swap points!
Okay!
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rocket
Go to first place!
Okay!
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thief
Give points!
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25
5
×
True or False: An amplifier creates new energy out of thin air to make a signal louder.
False
True
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Check
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Check
25
×
What are two advantages of a Class D amplifier over a Class A amplifier?
They are much more efficient and produce significantly less heat.
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15
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In the context of amplifiers, what does the term "Distortion" mean?
An unwanted change in the waveform where the output does not perfectly match the input shape.
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25
×
What is the main difference between a Transistor and a Vacuum Tube amplifier?
Transistors use semiconductor material (solid-state), while tubes use heated filaments in a glass vacuum.
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25
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In an amplifier, what is the "Signal-to-Noise Ratio" (SNR)?
A measure that compares the level of a desired signal to the level of background noise. (The higher the ratio, the cleaner the sound).
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10
×
Name three common "Classes" of amplifiers.
Class A, Class B, Class AB, Class C, or Class D.
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lifesaver
Give 20 points!
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rocket
Go to first place!
Okay!
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fairy
Take points!
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25
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thief
Give points!
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25
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What is the purpose of a Heat Sink in a high-power amplifier?
To dissipate the heat generated by the transistors or tubes to prevent the components from burning out.
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5
×
Amplifiers can be found in devices other than just guitar amps and stereos.
False
True
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20
×
List two components often used as the "active element" in an amplifier to provide gain.
Transistors (BJTs/MOSFETs), Vacuum Tubes, or Operational Amplifiers (Op-Amps).
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10
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A pre-amplifier is usually the very last stage in an audio system before the speakers.
False
True
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15
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What do we call the "efficiency" of an amplifier?
The ratio of useful power output to the total power drawn from the supply.
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10
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What are the three main terminals of a Bipolar Junction Transistor (BJT) used in amplifying?
Emitter, Base, and Collector.
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